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package multiface.web.util;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.PixelGrabber;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;

/**
 *
 * @author Diego64
 */
public class ResizeBufferedImage {

    public static byte[] convertBufferedImage(BufferedImage bi) {
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(bi, "jpg", baos);
            baos.flush();
            byte[] imageInByte = baos.toByteArray();
            baos.close();
            return imageInByte;
        } catch (IOException e) {
            //Sy_stem.out.println(e.getMessage());
        }
        return null;
    }

    public static BufferedImage toBufferedImage(Image image) {
        if (image instanceof BufferedImage) {
            return (BufferedImage) image;
        }

        // This code ensures that all the pixels in the image are loaded
        image = new ImageIcon(image).getImage();

        // Determine if the image has transparent pixels; for this method's
        // implementation, see Determining If an Image Has Transparent Pixels
        boolean hasAlpha = hasAlpha(image);

        // Create a buffered image with a format that's compatible with the screen
        BufferedImage bimage = null;
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        try {
            // Determine the type of transparency of the new buffered image
            int transparency = Transparency.OPAQUE;
            if (hasAlpha) {
                transparency = Transparency.BITMASK;
            }

            // Create the buffered image
            GraphicsDevice gs = ge.getDefaultScreenDevice();
            GraphicsConfiguration gc = gs.getDefaultConfiguration();
            bimage = gc.createCompatibleImage(
                    image.getWidth(null), image.getHeight(null), transparency);
        } catch (HeadlessException e) {
            // The system does not have a screen
        }

        if (bimage == null) {
            // Create a buffered image using the default color model
            int type = BufferedImage.TYPE_INT_RGB;
            if (hasAlpha) {
                type = BufferedImage.TYPE_INT_ARGB;
            }
            bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
        }

        // Copy image to buffered image
        Graphics g = bimage.createGraphics();

        // Paint the image onto the buffered image
        g.drawImage(image, 0, 0, null);
        g.dispose();

        return bimage;
    }

    public static boolean hasAlpha(Image image) {
        // If buffered image, the color model is readily available
        if (image instanceof BufferedImage) {
            BufferedImage bimage = (BufferedImage) image;
            return bimage.getColorModel().hasAlpha();
        }

        // Use a pixel grabber to retrieve the image's color model;
        // grabbing a single pixel is usually sufficient
        PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
        try {
            pg.grabPixels();
        } catch (InterruptedException e) {
        }

        // Get the image's color model
        ColorModel cm = pg.getColorModel();
        return cm.hasAlpha();
    }

    public static byte[] ConvertImageToBytes(Image img) {
        return convertBufferedImage(toBufferedImage(img));
    }

    public static BufferedImage BufferdImageFromByte(byte[] bytes) {
        InputStream in = new ByteArrayInputStream(bytes);
        try {
            return ImageIO.read(in);
        } catch (IOException ex) {
            Logger.getLogger(ResizeBufferedImage.class.getName()).log(Level.SEVERE, null, ex);
        }
        return null;
    }

    private static BufferedImage resizeImage(BufferedImage originalImage, int IMG_WIDTH, int IMG_HEIGHT) {

        int type = originalImage.getType() == 0 ? BufferedImage.TYPE_INT_ARGB : originalImage.getType();

        BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type);
        Graphics2D g = resizedImage.createGraphics();
        g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null);
        g.dispose();
        g.setComposite(AlphaComposite.Src);

        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        return resizedImage;
    }

    public static BufferedImage resizeImageProporzionalWith(BufferedImage originalImage, int with) {
        int h = originalImage.getHeight();
        int w = originalImage.getWidth();

        if (w > with) {

            int x = (int) (h * with) / w;

            return resizeImage(originalImage, with, x);
        } else {
            return originalImage;
        }
    }

    public static byte[] resizeImageProporzionalWith_Bytes(BufferedImage originalImage, int with) {
        return convertBufferedImage(resizeImageProporzionalWith(originalImage, with));
    }

    public static byte[] resizeImageProporzionalWith_BytesToBytes(byte[] originalImage, int with) {
        return convertBufferedImage(resizeImageProporzionalWith(BufferdImageFromByte(originalImage), with));
    }
}
